0625/42 · May/June 2024
Theory (Extended) · 80 marks · 11 questions
- Question 18 marks
Weight and mass, and the resultant of forces.
- Question 26 marks
Acceleration, F = ma, and electric motors.
- Question 36 marks
Energy transfers in free fall.
- Question 48 marks
Evaporation and boiling, the kelvin scale, insulation and gas pressure.
- Question 58 marks
Refraction, refractive index, critical angle and optical fibres.
- Question 68 marks
Sound waves, amplitude and frequency, and the speed of sound.
- Question 710 marks
Magnetism, a step-down transformer, efficiency and power.
- Question 87 marks
Circuits with an LDR and an LED, and resistance from V and I.
- Question 97 marks
Radiation safety, alpha and beta emitters and decay equations.
- Question 107 marks
The Solar System, orbits, and the time light takes to travel.
- Question 115 marks
Galaxies, redshift and the cosmic microwave background.